钻井液用反相乳液聚合物增黏剂的合成及评价  

Synthesis and Evaluation of Reversed-Phase Emulsion Polymer Viscosifier for Drilling Fluid

作　　者：孙振峰 SUN Zhenfeng(Sinopec(Dalian)Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian Liaoning 116045,China)

机构地区：[1]中石化(大连)石油化工研究院有限公司,辽宁大连116045

出　　处：《当代化工》2024年第7期1513-1518,共6页Contemporary Chemical Industry

基　　金：中国石化重点科技项目(项目编号:421034)。

摘　　要：以两性离子单体N-甲基二烯丙基丙磺酸、N,N-二甲基丙烯酰胺、N-乙烯基己内酰胺为聚合单体,以偶氮二异丁脒盐酸盐(AIBA)为引发剂,采用反相乳液聚合法制备了增黏剂乳液DVL-1,有效固相质量分数为33%。利用FTIR、^(1)H NMR、TG-DTA等方法对DVL-1进行了表征测试,并对产物的增黏性能、抗高温抗盐性能等进行了评价。结果表明:质量分数为1%的DVL-1水溶液表观黏度可达17.4 m Pa·s。180℃/16 h高温老化后,溶液黏度保持率高达52.9%。通过观察DVL-1在溶液中的空间立体形态及对Zeta电位的数据分析,探讨了聚合物起效机理,DVL-1的抗温性能主要归因于分子结构中稳定的主链及侧链刚性基团,两性离子结构降低了聚合物对高价盐离子的敏感性,抑制了侧链的持续卷曲,抗盐性能得到显著提升。Viscosifier emulsion DVL-1 was prepared by inverse emulsion polymerization with zwitterionic monomers N-methyldiallylpropanesulfonic acid,N,N-dimethylacrylamide,and N-vinylcaprolactam as polymerization monomers and azobisisobutyl amidine hydrochloride (AIBA) as initiator.The effective solid mass fraction of DVL-1 was 33%.DVL-1 was characterized by FTIR,^(1)H NMR,TG-DTA,and its viscosity enhancing properties,high temperature and salt resistance were evaluated.The results showed that the apparent viscosity of mass fraction 1%DVL-1 solution could reach up to 17.4 m Pa·s.After hot aging at 180℃for 16 h,the viscosity retension was as high as 52.9%.By observing the three-dimensional morphology of DVL-1 in solution and the data of Zeta potential,the effective mechanism of polymers was discussed.The temperature resistance of DVL-1 was mainly attributed to the stable main chain and side chain rigid groups.The sensibility of polymers to high valence salt ions decreased,of which due to the existence of zwitterionic structure,the crimp of side chain was thus inhibited and the salt resistance performance was therefor significantly improved.

关 键 词：合成 钻井液 增黏剂 抗温 抗盐 聚合 聚合物 

分 类 号：TQ031.2[化学工程] TE254.4[石油与天然气工程—油气井工程]